Image Inspection Method Using Multiple Cameras

An inspection method and image technology, applied in image enhancement, image analysis, signal generator with multiple pickup devices, etc., can solve the problem of printing personnel unable to engage in printing monitoring and so on

CN107155094BActive Publication Date: 2018-09-11HEIDELBERGER DRUCKMASCHINEN AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-09-11

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Abstract

The invention relates to a digital image inspection method. A plurality of image capturing devices respectively photograph digital sub-images of a printed image to be inspected, and the digital sub-images are combined into a digital overall image in an image processing computer, and the overlapping areas of the sub-images generate butt joint edges. Edge, the image processing computer checks the digital overall image and sends the result to the control computer of the machine processing the printing material. The image processing computer creates a new image with the help of the edge detection method: only the detected edges are included. The image processing computer uses the image capture device Create another new image with the known position of the docking edge: only include the area with the docking edge of the image capture device, and the image processing computer will overlap the two newly created images to generate a composite image: only include the edge along the image capture device docking edge The image processing computer applies the composite image to the digital ensemble image to define occluded areas in the composite digital ensemble image that are not detected by the image inspection.
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Description

technical field

[0001] The invention relates to a digital image inspection method using multiple cameras.

[0002] The invention is in the technical field of automated quality control of printed products. Background technique

[0003] In the printing industry, the automatic quality control of the printed products produced has been known for a long time. For this purpose, the produced printed product is usually image-wise detected using a camera system consisting of one or more digital cameras. In this case, the digital camera can be installed both inside the printing press (advantageously after the last printing unit) or outside the printing press on the stacker.

[0004] In this case, a system with an internally installed digital camera is in most cases an integral part of the printing press itself, whereas an image inspection system with an externally installed digital camera is mostly external and Systems that work independently, however, these external and independent...

Examples

Embodiment Construction

[0045] Figure 8 The flow of the method according to the invention is schematically shown. The printing job is started with the print job data and is image-captured with the camera system 32 of the image inspection system 28 during continuous printing. here, in Figure 9 An image inspection system 28 is schematically shown in . In addition to the printing press 31 itself, the image inspection system 28 includes a camera system 32 installed in the printing press 31 and an image processing computer 33 connected directly to the camera system 32 and to the control computer 29 of the printing press 31 . In this case, the control computer 29 forms the interface to the user 27 with its display 30 . The camera system 32 itself is in Figure 10 is schematically shown again. The camera system 32 is installed inside the printing press 31 (usually after the last printing unit) and comprises two digital cameras 35 arranged horizontally side by side in the form of electronic line scan...